I don't think it's unreasonable to expect a PATH to upgrade (even at a cost to the consumer). Only reason I say so is that like many, I PAID to be a BETA tester for Tesla. This is unprecedented, to say the least. I've been in IT for a LONG time never paid to beta test anything for anyone.
I would think that since we provide a value to Tesla by allowing them to collect all that data that they are now leveraging to perfect (or at least IMPROVE) their product, we should be provided a path to make use of that information data in OUR cars at a reasonable cost.
I know... people in Hell want Ice water.... doesn't mean they're going to get it. I'm just saying, I don't think it would be unreasonable to ask for an upgrade path at cost.
I answered this in another thread but the issue is that it would take a lot of time/money to design a upgrade for AP1.0 cars and given the cost of some other update retrofits ($500 parking sensors cost over $6000 as a retrofit, $500 power folding mirrors were $2700 for another) it seems like it would be a very expensive conversion. I have no doubt that were it made available it could easily cost more than $20000 to retrofit. Before you think that sounds crazy you need to look at those past examples and also remember this is a different system completely with a different harness, computer, sensors, cameras, etc.
So, assuming it is a $20k or more update how many people would sign up for it instead trading into another model s/x with it? Very few if any, which is why the effort to design such a retrofit would be a foolish use of resources when bring the model 3 to market is where those resources need to go.